"Lots of things these games – Demon's Souls and Dark Souls – did, like leaving the message to other people asynchronously, so you feel connected, but not really connected at the same time," said Yoshida on the latest PlayStation Blogcast episode.

"All of these things inspired us when we were designing the system features for PS4."

He added: "Like sharing features. I enjoy so much watching people play Dark Souls on YouTube. These games still have a special place in my memory."

'Demon's Souls'

'Demon's Souls'

Originally launched in 2009, Demon's Souls is exclusive to PlayStation 3.